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Income Taxes (Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	34.00%	34.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income	(13.10%)	(11.30%)	(7.70%)
Effective Income Tax Reconciliation, Nondeductible Expense, Merger Expenses	2.70%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent	0.30%	0.30%	0.40%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Percent	2.80%	1.80%	1.50%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance	(2.80%)	(1.80%)	(1.50%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Percent	2.80%	1.80%	1.50%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	(0.20%)	0.40%	0.20%
Effective Income Tax Rate, Continuing Operations, Total	21.90%	21.60%	25.40%

X

- Definition

Effective Income Tax Reconciliation, Nondeductible Expense, Merger Expenses

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to life insurance expense.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to equity-based compensation costs.

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